MESSAGE
| DATE | 2011-06-05 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [NYLXS - HANGOUT] C++ iostream linking
|
I have a newish workstation on an operton64 system with a fresh opensuse
11.4 x86 64 bit install.
I'm trying to compile a program that I started, nothing special, that
uses iostream but I'm getting this linker error
ruben-at-stat18:~/cplus> make
g++ -Wall -o quiz quiz.o
quiz.o: In function `std::basic_ios
>::basic_ios(std::basic_ios > const&)':
quiz.cpp:(.text._ZNSt9basic_iosIcSt11char_traitsIcEEC2ERKS2_
[_ZNSt9basic_iosIcSt11char_traitsIcEEC5ERKS2_]+0x1f): undefined
reference
to `std::ios_base::ios_base(std::ios_base const&)'
collect2: ld returned 1 exit status
make: *** [quiz] Error 1
It compiles fine on my other workstation
#include
#include "questions.h"
#include
#include
int main(int argv, char *argc[]){
Questions::menu();
return 0;
}
questions.h
#ifndef QUESTION
#define QUESTION
#include
#include
#include
#include
#include
namespace Questions {
class Question{
public:
Question(std::string q, std::string a): quest(q), answer(a){ }
private:
std::string quest;
std::string response;
std::string answer;
Question(Question const ©);
};
class Deck{
public:
std::vector deck;
Deck(){
std::string home = std::getenv("HOME");
database = home + "/quiz.db";
size = 0;
}
void get_stack();
Question get_question();
void give_quiz();
void add_questions(Question &enter);
void add_database();
private:
int size;
std::string database;
};
void menu(std::ostream &os = std::cout);
void menu(std::ostream &os){
os << "Welcome the the C++ Quiz" << "\n\n\n\n" << std::endl;
std::string tmp = " \n "
"Select from one of the following: \n\n"
"a) Insert Question and Answer into the database\n"
"b) Read 25 Questions and run Quiz\n\n\nResponse==> ";
os << tmp << std::endl;
}
} //end of namespace Question
#endif
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.5/lto-wrapper
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --
mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --
enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-
checking=release --with-gxx-include-dir=/usr/include/c++/4.5
--enable-ssp
--disable-libssp --disable-plugin
--with-bugurl=http://bugs.opensuse.org/
--with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --
with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-
libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-
runtime-libs --program-suffix=-4.5 --enable-linux-futex
--without-system-
libunwind --enable-gold --with-plugin-ld=/usr/bin/gold --with-
arch-32=i586 --with-tune=generic --build=x86_64-suse-linux
Thread model: posix
gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux)
This is the makefile
quiz : quiz.o
g++ -Wall -o quiz quiz.o
quiz.o : quiz.cpp
g++ -Wall -c quiz.cpp
I'm not certain why it can't find the iostream copy constructor.
Ruben
|
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